System and method for locating radio emitters using self-calibrated path loss computation
a radio emitter and computation method technology, applied in direction finders, direction finders using radio waves, instruments, etc., can solve the problems of increased system cost and laborious user-assisted system calibration, and achieve the effect of improving the accuracy of receive signal strength based location systems and reducing complexity
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[0018] The position / location estimation system and method described herein uses received signal strength (RSS) of the signal emitted by the device to be located (target device) and does not require the aforementioned laborious offline calibration or imported coverage maps. The algorithm may be implemented in two phases, an offline phase for sensor self-calibration, and an online phase for real-time position estimation.
[0019] The System in General
[0020] With reference to FIG. 1, a system 10 is shown comprising a plurality of radio sensor devices (sensors) 200, 210, 220 and 230 and a server computer 400. The sensors are deployed at known positions. Sensors can both transmit and receive signals from each other and receive signals from the device to be located, called a target device 100. For example, sensor 200 is at position usens1, sensor 210 is at position usens2, sensor 220 is at position usens3 and sensor 230 is at position usens4. An example of a sensor is described hereinafter...
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